{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SP3820-2","brand":"Siemens","brandSlug":"siemens","productSlug":"5SP3820-2","canonicalUrl":"https://aoctrl.com/siemens/5SP3820-2","factsUrl":"https://aoctrl.com/api/mcp/products/5SP3820-2","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SP3820-2, main miniature circuit breaker, 3-pole, 20 A rated at AC, 25 kA breaking capacity, E tripping characteristic, 400 V AC.","salesMarkdown":"The Siemens 5SP3820-2 is a SENTRON main miniature circuit breaker (MCB), designed as a 3-pole unit with a rated current of 20 A at AC and a breaking capacity of 25 kA per EN 60898. It carries an E tripping characteristic, which means it's tuned for a specific overload curve — less common than B or C curves, so verify coordination with downstream loads. That's a high-interrupting rating for a 4.5-module-width MCB, so it's meant for service-entrance or main-switch positions where fault current is high. The E-curve is a slower, more delayed curve than a standard C-curve, designed to ride through inrush from large transformers or capacitor banks without nuisance tripping. Temperature derating is published: 20 A at 30 °C, 19 A at 40 °C, 18 A at 50 °C.","metaTitle":"Siemens 5SP3820-2 SENTRON MCB, 3P, 20A, 25kA, E-Curve","metaDescription":"Siemens 5SP3820-2 SENTRON miniature circuit breaker, 3-pole, 20A rated, 25kA breaking capacity per EN 60898, E tripping characteristic. Active production. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"Depth":"89.5 mm","title":"5SP3820-2","Height":"151.3 mm","Maximum":"70 °C","Minimum":"-40 °C","Sealable":"Yes","Rated Value":"25 kA","description":"Main miniature circuit breaker (SHU), 3x 1-pole, E 20A, 230/400 V Mounting on 40 mm busbars","Number Of Poles":"3","Solid / Maximum":"50 mm²","Solid / Minimum":"2.5 mm²","lifecycle_stage":"current","Fastening Method":"Busbar","Shock Resistance":"30 g, at least 3 impacts, impact duration 11 ms","Product Brand Name":"SENTRON","Stranded / Maximum":"50 mm²","Stranded / Minimum":"2.5 mm²","Degree Of Pollution":"3","Product Designation":"Miniature circuit breaker","acc. to IEC 81346-2":"F","at AC / rated value":"20 A","protection class IP":"IP40, with connected conductors","Overvoltage Category":"IV","Design Of The Product":"Main miniature circuit breaker","Infeed At Box Terminal":"Yes","Number Of Poles / Note":"3P","acc. to DIN EN 61346-2":"F","at 30 °C / rated value":"20 A","at 40 °C / rated value":"19 A","at 45 °C / rated value":"18.5 A","at 50 °C / rated value":"18 A","at 55 °C / rated value":"17.5 A","Depth / Of The Enclosure":"76.3 mm","Suitability For Operation":"Residential buildings/infrastructure","Design Of The Locking Device":"Locking slide with lock, additional wire seal, cable ties and Antilux","Number Of Modular Width Units":"4.5","Tripping Characteristic Class":"E","acc. to EN 60898 / rated value":"25 kA","Position / Of Power Supply Cord":"Stipulated by installation in the lower section of the meter panel","Insulation Voltage / Rated Value":"690 V","supply voltage / at AC / rated value":"400 V","Surge Voltage Resistance / Rated Value":"6 kV","Outgoing Feeder Via Spring-Loaded Terminal":"Yes","Fastening Method / Other Installation / Note":"On 40-mm busbar system in compliance with DIN 43870 Part 2","vibration resistance / acc. to IEC 60068-2-6":"2 g, 20 frequency cycles 5 to 150 to 15 Hz","Display Version / For Switch Position Indicator":"OFF = green, ON = red","Mechanical Service Life (Operating Cycles) / Typical":"20 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/40f946f67ae55c0bb8e6768aecf90201.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=440224&mlfb=5SP3820-2"},"ai":{"faq":[{"question":"What is the E tripping characteristic on this MCB?","answer":"The E curve is a delayed tripping characteristic, slower than B or C curves, designed to tolerate higher inrush currents from transformers or capacitive loads without nuisance tripping."},{"question":"What wire sizes does the 5SP3820-2 accept?","answer":"It accepts solid conductors from 2.5 mm² minimum to 50 mm² maximum, and stranded conductors from 2.5 mm² minimum to 50 mm² maximum."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SP3820-2","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/siemens/5SP3820-2 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}